I know some Tsubaki fans. Kanon has less because they said her voice is somewhat annoying. I'm not really a fan of Haru, despite having the best story.
I pretty much agree with your opinion on Sukitte ii na yo (Say 'I love you') though Tonari no Kaibutsu-kun had a lot more comedic elements in my opinion. I still have to watch Sakurasou Pet no Kanojo...
Feels like this one will make me stop watching Kotoura. And yeah, go for Sakurasou.
I love the art of the 3 VNs made by AB2, and Kamidori Alchemy Meister.
When it comes to Resolution, it's Your Diary which I saw to have the same one, TL is not yet done though.